Transform your spa experience with Hot Tub Things® pH & Alkalinity Down, the professional-grade granular formula designed to quickly and safely lower pH and total alkalinity levels in your hot tub or spa. When your water’s pH rises above the ideal range (7.2-7.8), it can cause cloudy water, scale buildup, and reduced sanitizer effectiveness. Our fast-dissolving granular formula restores perfect water balance in minutes, ensuring your spa water stays crystal-clear, comfortable, and safe.








